Cobra 25 ltd VFO WIND UP?

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fernan_01
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Cobra 25 ltd VFO WIND UP?

Postby fernan_01 » Sun Jun 24, 2018 7:31 am

Hello, is there any way to make the VFO windup mod to cobras 25 or uniden 68 just like the cobra 29 and 148?
thanks
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Goldfinger
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Re: Cobra 25 ltd VFO WIND UP?

Postby Goldfinger » Sun Jun 24, 2018 7:35 pm

There isn't a Delta-tune. Because of this there isn't TX/RX switching on the reference crystal. Without that present there is no easy way to do the windup.
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fernan_01
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Re: Cobra 25 ltd VFO WIND UP?

Postby fernan_01 » Mon Jun 25, 2018 10:30 am

Thanks i’ve even tried with a relay with no luck.
Thanks
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Re: Cobra 25 ltd VFO WIND UP?

Postby Goldfinger » Tue Jun 26, 2018 7:34 pm

It looks like most of the 25 schematics don't even have a capacitance diode on the 10.240 crystal. The circuit would need to be heavily modified.
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